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Question
Which of the following statements are true and which ones are false? Give reason in support of your answer.
Most transpiration occurs during midday.
Options
True
False
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Solution
True
Reason: During the day, the stomata are open to facilitate the inward diffusion of carbon dioxide for photosynthesis. During mid-day, the outside temperature is higher, due to which there is more evaporation of water from the leaves. Therefore more transpiration occurs during mid-day.
RELATED QUESTIONS
Why are the stomata in most plants more numerous on the lower surface of a leaf instead of being on the upper surface?
Answer the following (only in few words);
In which form, water comes out in transpiration?
Explain the term:
Cuticular transpiration
The following diagram is set up to demonstrate an experiment.
Five plants A, B, C, D, and E were placed in a beaker containing water. The water in each beaker was covered with a layer of oil. The leaves were removed from plant D in plant B, upper surfaces of all the leaves were covered with Vaseline, in-plant C the lower surfaces of all the leaves were covered with Vaseline and plant E was exposed to strong light. The beakers were then left for a few hours and at the end of the experimental period, weights of each beaker were taken.
Write the correct answer out of the five available choices given under each question:
I. In which beaker would you expect the greatest decrease in weight?
(i) A (ii) B (iii) C (iv) D (v) E
II. In which beaker the change of weight would be minimum?
(i) A (ii) B (iii) C (iv) D (v) E
III. Which plant would remain healthy for a longer period of time?
(i) A (ii) B (iii) C (iv) D (v) E
IV. In this experiment which plant can be considered as the uncontrolled one?
(I) A (ii) B (iii) C (iv) D (v) E
V. The difference of weight would b maximum between:
(i) A and B (ii) A and C (iii) A and D (iv) A and E (v) D and E
Complete the following sentence with appropriate word:
Transpiration is the loss of water__________________from the leaves of the plant.
Choose the Odd One Out
Mark the most appropriate answer in the following:
In hot summer days, plant cooling is due to :
Give a reason/suitable explanation.
Forests tend to bring more rains.
